Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 9,2013, Pages 676-682, doi:10.3760/cma.j.issn.0529-567x.2013.09.009
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 9,2013, Pages 683-685, doi:10.3760/cma.j.issn.0529-567x.2013.09.010
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 9,2013, Pages 716-718, doi:10.3760/cma.j.issn.0529-567x.2013.09.021
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 9,2013, Pages 663-666, doi:10.3760/cma.j.issn.0529-567x.2013.09.006
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 9,2013, Pages 694-697, doi:10.3760/cma.j.issn.0529-567x.2013.09.015